David Ruffin stepped out of the Temptations-he was the voice of "My Girl"-into the golden spotlight of solo success an even greater singer. Maybe it was his liberation from a group in which he never quite fit; maybe it's the autobiographical songs that seem to fit his tempestuous nature. Whatever the reason, the record stands among Motown's boldest statements. And his producers-Harvey Fuqua and Johnny Bristol among them -arm him with material he pulverizes.